$(function(){
	screenWidth = window.screen.width;
	screenHeight = window.screen.height;
	devicePixelRatio = window.devicePixelRatio;
	$.ajax({
		url:"/ajax/aj_deviceInfo.php",
		type:"post",
		data:"screenWidth="+screenWidth+"&screenHeight="+screenHeight+"&devicePixelRatio="+devicePixelRatio,
		dataType: "json",
	})
})